HPA non-linear distortions in DVB-T systems simulation and measurement

The new digital standards adopted in Europe for broadcast communication systems use the orthogonal frequency division multiplexing (OFDM) technique which is characterised by non-constant envelope signals. This fact is in contrast with the employment of RF high power amplifiers (HPAs) which are typic...

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Bibliographic Details
Published in1998 URSI International Symposium on Signals, Systems, and Electronics. Conference Proceedings (Cat. No.98EX167) pp. 124 - 127
Main Authors Andreoli, S., Banelli, P., Marrocolo, F., Massini, C.
Format Conference Proceeding
LanguageEnglish
Published IEEE 1998
Subjects
Bit error rate
Communication standards
Degradation
Digital video broadcasting
Employment
Europe
High power amplifiers
Nonlinear distortion
OFDM
Radio frequency
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Summary:The new digital standards adopted in Europe for broadcast communication systems use the orthogonal frequency division multiplexing (OFDM) technique which is characterised by non-constant envelope signals. This fact is in contrast with the employment of RF high power amplifiers (HPAs) which are typically non-linear and utilised with low output back off (OBO) in order to maximise the power efficiency. The consequent generation of intermodulation products (IMPs) is responsible for bit error rate (BER) degradation and adjacent channel interference (ACI). This article presents Itelco's experience in this area, outlining the DVB-T performance dependence from the OBO. Moreover the improvements achievable by AM/AM-AM/PM predistortion and by RF non-linear memory compensation are analysed both by simulation and measurements.
ISBN:9780780349001
0780349008
DOI:10.1109/ISSSE.1998.738051